Z Ursa Minoris -- a new R Coronae Borealis variable

Details Z Ursa Minoris -- a new R Coronae Borealis variable Z Ursa Minoris -- a new R Coronae Borealis variable

Jul 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994aj....108..247b&link_type=abstract

The Astronomical Journal, vol. 108, no. 1, p. 247-250

Astronomy and Astrophysics

Astronomy

17

Cataclysmic Variables, Emission Spectra, R Coronae Borealis Stars, Stellar Spectrophotometry, Charge Coupled Devices, Light Curve, Stellar Spectra

Scientific paper

We have monitored Z Ursa Minoris using a V filter beginning 1992 April. It suddenly dimmed by almost 6 mag in late summer 1993. We obtained a spectrum 1993 November 20.54 UT which confirms that Z UMi is probably an R Coronae Borealis (RCB) star. The spectrum of Z UMi shows the strong carbon bands and weak hydrogen lines of an RCB star. It also shows the typical late decline emission in the Na I D lines. The light curve shows evidence for stellar pulsations as well as the large and rapid fading which characterizes the RCB stars.

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